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11.实验室用含有少量碳酸镁杂质的块状碳酸钙与盐酸反应制取二氧化碳。 (1)通过长颈漏斗向放有块状碳酸钙的大试管中加入足量盐酸,充分反应,在大试管中可观察到的现象是__________。 (2)反应完毕,欲从反应液中制取少量纯净的氯化钙晶体,拟进行下列几项操作: ①蒸发;②过滤;③加入适量的X溶液;④加入足量氧化钙。 X的化学式是_________;上述几项操作正确的操作顺序(填序号)是____。 (3)在下图所示的仪器中,进行蒸发操作要选用的有(填仪器编号)____,其中,(填仪器名称)____是进行过滤和蒸发时都要使用,但使用目的各不相同的玻璃仪器。
11. The laboratory used bulk calcium carbonate containing a small amount of magnesium carbonate impurities to react with hydrochloric acid to produce carbon dioxide. (1) A sufficient amount of hydrochloric acid is added to a large test tube containing massive calcium carbonate through a long-necked funnel, and the reaction is fully observed. The observed phenomenon in the large test tube is __________. (2) After the reaction is completed, a small amount of pure calcium chloride crystal is to be prepared from the reaction solution. The following operations are to be performed: 1 evaporation; 2 filtration; 3 adding an appropriate amount of X solution; 4 adding sufficient amount of calcium oxide. The chemical formula of X is _________; the correct sequence of operations for the above operations (sequence number) is ____. (3) In the instrument shown in the figure below, the evacuation operation should use the (filled instrument number) ____, where (fill instrument name)____ is used for filtration and evaporation, but the purpose of use is different Glass instrument.